r2rml/README.md

R2RML Implementation

Building and using the code

To build the project and copy its dependencies, execute

$ mvn package
$ mvn dependency:copy-dependencies

The run the R2RML processor, execute the following command

$ java -jar r2rml-0.0.1-SNAPSHOT.jar config.properties

Where config.properties is a properties file containing:

• connectionURL, a JDBC connection URL to a database (required)
• user, username for the user connecting to the database
• password, password for the user connecting to the database
• mappingFile, the R2RML mapping file (required)
• outputFile, the output file (required)
• format, format of the output files (default "TURTLE")
• filePerGraph, flag to write the different graphs in separate files (default "false")
• baseIRI, used in resolving relative IRIs produced by the R2RML mapping

When named graphs are used in the R2RML mapping, one should use serelizations that support graphs such as N-QUADS and TRIG. The use of other serializations formats (such as TURTLE) results in all triples of all graphs being written away to that file. When setting the flag filePerGraph to true for seralization formats that do not support graphs, however, the value for outputFile will be used to create a directory in which a file will be created for each graph in RDF dataset.

License

This implementation of R2RML is written by Christophe Debruyne.

This code is copyrighted by ADAPT - Trinity College Dublin and released under the MIT license.